Added newStencil

Added newStencil support, this was the dumbest addition ever done to this library but anyway... it works
Added setLine

setLine was splitten into setLineWidth and setLineStyle
Added setPoint

This is the same fix as setLine really.
Added drawq

drawq the function to draw quads was merged into draw
Added quad and triangle

This two functions were removed because they could be easily replicated with polygon
Added get/set DefaultImageFilter - DefaultFilter

This part of the API was renamed and a new argument/return value was added, called anisotropy, this number is not implemented in 0.8.0 so it will always be 1
Added draw to support quads

Love 0.9.0 added an option to love.graphics.draw to directly draw quads instead of using drawq, this function tries to recreate the same functionality for 0.8.0
Merge pull request #10 from Positive07/master

Graphics features